Surfacing-machine.



PATENTED DEC. 24, 1907.

J. F. STOLL. SURFAGING MACHINE.

APPLIOATION FILED JULY30. 1906.

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wnms PETERS ca. m4

No. 874,549. I PATENTED DEC. 24, 1907.

J F. STOLL.

SURFAUING MACHINE.

APPLIOATIOKPILED JULY30.1906.

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"No. 874,549. v PATENTED DEC. 24, 1907.

"JLRSTOLL. SURPAOING MACHINE.

APPLIGATION FILED JULY 30. 1906.

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UNITED STATES PATENT OFFICE.

JOHN F. STOLL, OF GUYAHOGA FALLS, OHIO.

SURFAGING-MACHIN E.

Specification of Letters Patent.

Patented Dec. 24, 19077.

Application filedJuly 301 1906- serial No. 323,372-

ground, smoothed and olished, all of which o erations are include in the general term o surfacingl,-and this termwill be used throughout t e specification and claims.

W1th the foregoing and other objects in View, the invention consists in the novel construction, combination and arrangement of parts constituting the invention to be hereinafter referred to and illustrated in the accompanying drawings winch form a part of this specification in which is shown the preferred embodiment of the'invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

In the drawings, in which similar reference numerals indicate like parts in the different figures: Figure 1 is a'front elevation'of my device with portions thereof broken away to make the understanding of the illustration clearer; F i 2 is a plan; Fig. 3 is a side elevation; an Fig. 4 is a rear elevation with certain parts omitted and other art-s in section to illustrate more clearly t 1e construction. of the device.

Before proceeding to a detailed description of the mechanism of this device, it will be stated that it consists of a truck suitablywhich is made of sufficient strength to sustain the mechanism mounted thereon. The forward-end of this truck is provided on its mounted a shaft 22.

under face with a pair offixed brackets 2, through which extends a shaft 3 on which are tightly mounted wheels 4.v The rear end of the truck is supported and the device steered by the following mechanism:

Revolubly mounted in suitably-disposed bushings 5 are apair of caster frames 6 each provided with a shaft 7, and on these shafts are loosely mounted wheels 8. In order to control the movement of these rear Wheels,

there is fastened to the inside of each of these frames 6 a bracket 9 having the outer face thereof formed with spur teeth and constituting a segmental rack gear 10. Between these rack gears 10 is a pinion 1 1 mounted at the lower end of an upright revoluble shaft 12 which is mounted in asuitable bushing 13 constituting a lower hearing-for, theshaft, the upper portion of which is supported by a tripodal structure consisting of sideand rear braces 14 attached at the lower ends to the up er face of the truck 1, and at their upper en s to a bearing 15. Above the bearing 15 is a collar 16 to retain the shaft in osition. The n per end of this shaft is provi ed with a hand wheel 17 by which the movements of the shaft 12 and the wheels 8 are controlled. The mechanism for surfacing the floors and for propelling the vehicle is as follows:

Mounted on the truck 1 in front of the steering wheel 17 is an electric motor 18 which is" supplied with current from any ordinary current conveying means; but the type thereof is immaterial to this invention, and the particular style-of motor and the means of controlling the same is discretion.- ary with the builder of the device, and it-Will be stated that in the illustrations only the outline of a motor is shown in order to indicate its position with reference to the other mechanism.

Mounted on the front end of the truck 1 is a frame 19 provided with a depending front end. Upon this frame is mounted an up right housin 20 having in its upper portion an elon ated bearing 21 in which is freely The rear end of this shaft where it projects from the bearing 21 bears two gear-wheels 23 and 24, and the outer end thereof beyond the gear 24 is splined and arranged to receive a collar 25 which connects it with the motor shaft 26 which is spaced therefrom and also splined so that any longitudinal movement'which I side of the standards 38.

injur to the mechanism which is driven there y. On the forward end of the shaft 22 is a beveled pinion gear 26. This pinion 26 is adapted to intermesh with a beveled gear 27 mounted tightly on a horizontal transverse shaft 28. This shaft 28 also bears a pair of friction clutches,- each consisting of a male member 29 splined thereto and a loose female member 30 provided with a sleeve, indicated in dotted lines in Fig. 1 and revoluble on the shaft 28. Mounted on the uper face of the frame 19 are two upright brackets 31 provided at their u per ends with journal-bearings to receive t 1e sleeve portions of the female members 30 of the friction clutches thereby sustaining the shaft 28 in position. Mounted on the outer face of the sleeve portions of the female members 30 of the clutch are a pair of beveled gears 32 which are adapted to intermesh with beveled pinion-gears 33 splined on vertical, parallel and rotatable'shafts 34, in order to permit the free vertical sliding of these shafts without interruption. The shafts 34 are mounted in two bearings 35 and 36 secured to the upper and lower faces respectively, of the front portion of the frame 19.

On the lower ends of each of the shafts 34 is a surfacin disk 37 It will be here stated that the mafie up of these surfacing disks is immaterial to the description of this device for the reason that various types and forms of such wheels may be placed on the lower ends of the shafts. 34, each of which is designed to performa difierent function in grinding, polishing, abradin or smoothing of a floor. This will be easily illustrated by the following example: If the wood of the floorwhich is to be surfaced is hardwood, a different form of disk would be employed than that which would be employed for soft wood. Again, a different form of disk would be employed in making the first cut or ro hing. of the wood than that which be employed for polishing the same woul after being smoothed, and hence a description of the disks themselves is believed to be superfluous in this-specification.

To maintain a definite and preferable amount of pressure on the disks in order to make them perform their functions in the best possible manner, the following mechanism 1S employed: Attached to the outer front side-faces of the frame 19 are a pair of upwardly-extending standards 38, suitably perforated at their upper ends to receive a transverse, horizontal rod 39 which is preferably held in position'by means of nuts out Pivotally secured to the rod 39 are the front ends of parallel bars 40, the members of each pair being united at their rear ends to blocks 41 by means of bolts 42. These blocks 41 are intended to clamp between them a rearwardlyextending beam 43, the rear end of each of which'is permitted to oscillate vertically and is uided and steadied by an upright stand+ ard consisting of arallel members 44, the lower ends of whic are secured to the upper face of the truck 1. These beams 43 may bear a weight 45 which is slidable thereon and is used to produce a necessary pressure upon the shafts 34. p

In order to further regulate and control the amount of pressure exerted by each beam 43 upon the shafts 34, I place between each .of the members 44 of the upright guides a coiled spring 46 which rests upon blocks suitably sustained between the members of each air. The bars 40 and beam 43 on each side 0 the device constitute a yoked lever, and in order to engage the shaft 34 there is laced between thebars 40 a clevis 47 whic is perfo rated to receive the shaft 34 and is provided with side trunnions 48 which pass through suitable o enings in the bars 40.' Below the .tion of the shafts 34. I customarily place on the upper ends of the shafts. 34 nuts 50, so that w ran the beams 43 are raised the disks will be lifted from the floor. The friction clutches mounted on the shaft 28 are used to control the rotation of the shai ts 34 and surfacing disks 37. These friction clutches are manipulated and thrown into and out of operation by the following mechanism: Mounted on the front upper face of the frame 19 are a pair of step bearings 51 in which are freely mounted upright shafts 52, and these shafts are supported near their upper face by passing through bearings 53 attached to the cross rod 39. These shafts each hear at their upper end an arm 54 to which is attached a rod 55 which passes backward through the opening between the members 44 and is supported by a pin 56 so that the free end thereof'will be within easy reach of the operator who is steering the device: The motion produced by the rod 55 is communicated to the male member of the clutch which is splined on the shaft 29 and revolves therewith by means of two arms 57 011 the upright shafts 52 which engage pins on loose collars 58 on the hubs of the male members of each clutch. It will be apparent that by manipulating either of the rods. 55, a simultaneous movement of the male member of the res ective clutch to which it is connected wi result, and the member is thrown into and out of operative .with the bearing 21 is a second bearing 59 in frame 19. The lower end of this shaft 64 the corresponding male member 69 of which,

bears a worm 67 which is adapted to engage and intermesh with a worm-wheel 68 (see Fig. 4) loosely mounted on'the shaft 3 and ad acent one of the wheels on said shaft. This worm-wheel is so formed on one side as to constitute the female member of a clutch,

is splined to the shaft 3 and is provided with a loose collar 70 to which are connected a air of arms 71 fixedly mounted on a revo-- uble, lbngitudinal shaft 72 properly supported bearings 73 and provided at its rear end with a hand lever 7 4 preferably situated within easy reach of the person who is steering thedevice. i

It will be seen from the foregoing that as the shaft 22 is operated by means of the motor 18, motion is transmitted through the mechanism just described to the worm and from thence to the Worm-wheel, and from thence by means of the male member 69 to the.- axle of the forward wheels of the device so that the device is pro elled by the same power used for rotating the disks. In order to collect the dirt and dust arising from the action of the disks 37, I inclose these two dicks in an elongated hollow sheet metal casing 75 from whichleads an eduction'pipe 76 to a fan 77-and from thence the "air and' dust is. transported by means of the convey' ing pipe 78to a receptacle 79.

t is believed that a detailed description of the receptacle 79 will be superfluous in this specification as any form of duster 'dirt' collecting receptacle may be used in con-f nection with this device.

' In order to rotate the fan 7 7, I mount on the truck 1 an upright bracket 80-having' in its upper portion a bearing for a shaft on which is mounted in adler gear 81 arranged to intermesh with the gear 24 on the shaft 22. Thls idler 81 is designed to mesh with a gear 82 on the shaft of the fan, and thus motion is communicated from the main shaft 22 to the fan-shaft through the intermeshing gears and the rotation of the fan thereby secured.

Between the bracket 80 and the idler 81, I

place a collar 83 which may be in the form of a horseshoe if desired to permit its ready removal. If it is desired to stop the operation of the fan, this collar 83 is removed and the idler 81 slipped along the shaft on which it is moimteduntil it is no longer in mesh with the gear 24.

What I claim and desire to secure by Letters 'Patent is v 1. A self propelled surfacing machine com rising a truck, means carried-by the truck or propelling it, a frame depending from the forward portion of the truck, bearings secured to the frame, a vertical shaft eX- tending through said bearings and depending'below the frame, a surfacing tool carried by the shaft, motion transmission mechanismdriven from said means and adapted to operatively connect with said shaft intermediate the ends thereof for rotating it and embodying a clutch device for operativelyconnecting and disconnecting said mechanism to and from said shaft, a pressure device engaging with .the'shaft for maintaining a predetermined pressure upon the tool, means for regulating said pressure device, a housing for the tool, a suction device mounted upon the truckat a point removed from the forward end thereof, said suction device independent of said tool carrying shaft-whereby of the tool, mechanism for transmitting suction device and said housing.

the said device can be operated independent motion from said propelling means to the suction device, and-aconduit-between sa d 2. A self-propelled surfacing machine comprising a truck, means carried by the truck for propelling it, a frame depending from the forward portion of thetruc'k,v bearings secured to the frame, avertical shaft ex'tendmediate the ends thereoffor rotating it and embodying a clutch device for operatively connecting and disconnecting said mechanism to cover said shaft, a pressure device engaging with the shaft for maintaining a redetermined pressure upon the tool, means for-re'guiatmg said pressure device, a housing for the tool a suction device mounted upon ti the truck-at a point removed from the forwardjlend thereof, said suction device independent of said tool carrying shaft whereby .the said device can be operated independent of the tool, mechanism for transmitting motion from said propelling means to the suctiondevice, a conduit between said suction device'and said housing, a receptacle carried by the truck, and a conducting pipe betfveensaid, suction device and said receptac e. 1

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN F. STOLL.

GLENARA Fox. 

